• Born date: n.a.
  • Born in: n.a.
  • Death year: 0877
  • Death in: Atholl
Causantín mac Cináeda

Causantín or Constantín mac Cináeda (in Modern Gaelic, Còiseam mac Choinnich; died 877) was a king of the Picts. He is often known as Constantine I, in reference to his place in modern lists of kings of Scots, though contemporary sources described Causantín only as a Pictish king. A son of Cináed mac Ailpín ("Kenneth MacAlpin"), he succeeded his uncle Domnall mac Ailpín as Pictish king following the latter's death on 13 April 862.

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